Complementarity relationship between coherence and path distinguishability in an interferometer based on induced coherence

• URL: http://arxiv.org/abs/2310.19765v3
• Date: Sat, 20 Jul 2024 13:21:09 GMT
• Title: Complementarity relationship between coherence and path distinguishability in an interferometer based on induced coherence
• Authors: Gerard J. Machado, Lluc Sendra, Adam Vallés, Juan P. Torres,
• Abstract summary: We derive a complementarity relationship that links the first-order coherence between the two interfering photons. We show that the derived relationship goes beyond the single-photon regime and is valid for any photon-flux rate generated.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We consider an interferometer based on the concept of induced coherence, where two photons that originate in different second-order nonlinear crystals can interfere. We derive a complementarity relationship that links the first-order coherence between the two interfering photons with a parameter that quantifies the distinguishing information regarding the nonlinear crystal where they originated. We show that the derived relationship goes beyond the single-photon regime and is valid for any photon-flux rate generated. We report experimental results in the low photon-flux regime that confirm the validity of the derived complementarity relationship.

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